500mm T8 Linear Lead Screw Rod with T8 Lead Screw Nut for CNC Machine 3D Printer Laser Engraver offers high quality stainless steel, high accuracy , high hardness, outstanding resistance to wear, smooth surface without burrs. Lead screw is simple to mount and convenient to use, made of high quality stainless steel material. T8 screwdriver and t8 lead screw are mainly used for equipment for industrial automation, stepper motor rails and 3D printers.